package org.bouncycastle.asn1.pkcs;

import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERSequence;

public class PBES2Parameters implements PKCSObjectIdentifiers, DEREncodable {
    private KeyDerivationFunc func;
    private EncryptionScheme scheme;

    public PBES2Parameters(ASN1Sequence obj) {
        Enumeration e = obj.getObjects();
        ASN1Sequence funcSeq = (ASN1Sequence) e.nextElement();

        if (funcSeq.getObjectAt(0).equals(id_PBKDF2)) {
            func = new PBKDF2Params(funcSeq);
        } else {
            func = new KeyDerivationFunc(funcSeq);
        }

        scheme = new EncryptionScheme((ASN1Sequence) e.nextElement());
    }

    public KeyDerivationFunc getKeyDerivationFunc() {
        return func;
    }

    public EncryptionScheme getEncryptionScheme() {
        return scheme;
    }

    public DERObject getDERObject() {
        ASN1EncodableVector v = new ASN1EncodableVector();

        v.add(func);
        v.add(scheme);

        return new DERSequence(v);
    }
}
